Hose coupling



y.Ilma 16, 193.1.

A. L. DoLD 1,810,268

HosE coUPLING Filed Aug. 16. 1928 IVI/[if 1 Asa; 4!

Patented June 16, 1931 UNITED STATES PATENT OFFICE HOSE COUPLING Application led August 16, 1928. Serial No. 300,086.

My ployed for connecting sections o invention relates to cou liJngs emhose, and

one object of my invention is to provide the ends of the shank or stem portions of such' couplings, inserted in'the ends of the hose sections, with protective cushioning or paddingemeans insuring tight contact with the rub r or other lining of the hose and completely closing any space or gap that may exist between such shank or stem and the lining of the hose.

A further object of my invention is to provide the shank or stem of a hose coupling with a cushion or protective pad of elastic or other suitable material lying between the end of such shank or stem and the inner elastic lining of the hose in order that all danger of injury 'to such inner surface of the hose at the point or zone where such inner surface would normally be in contact with said shank or stem of the coupling will be eliminated; such pad or cushion being particularly valuable in protecting the hose from possible cutting by the `end of such shank or stem should the hose be bent close to the coupling.

A further object of my invention is to dispose such protective pad or cushion within the end of the clamping members of the coupling which serve to prevent the extreme bending of the hose adjacent to the end of said shank or stem.

Afurther object of my invention is to provide a protecting pad or covering of material that will adhere to the rubber or other lining of the hose and prevent the material, liquid or otherwise, passing through the hose entering between such Shanks or stems and the inner surface or lining of the hose.v

These and other features of my invention are more fully described hereinafter; referi ence being had to the accompanying drawin which:

ings,

l is a sectional elevation of one Figure A form of hose coupling of usual or ordinary type.

Fig. 2 is a similar view of a hose coupling showing the ends of the Shanks or stems of the coupling members equipped with protective cushions or pads within the scope of my invention.

Fig. 3 is an enlarged sectional view of a portion of the structure shown in Fig.'2, and

Figs. 4 and 5 are cross sectional views on the lines IV-IV and V-V, Fig. 2.

My invention, though not limited thereto,

' has been designed for use with and is particularly applicable to couplings employed for connecting heavy sections of hose subject to extreme pressure in moving liquids and other fluid bodies,4 such as mine Water, usually accompanied by mud, small stones, gravel and/or the like, whereby the hose lining is subjected to excessive Wear.

No matter how tightly the externally applied clamping members may grip the hose, there is a slight gap between the end of the shank or stem and the inner wall of the hose, which wall is usually 0f rubber or of some rubber composition or material. The external wall of the shank .or stem is usually grooved or recessed to provide a corrugated surface, or otherwise shaped to insure embede ment in the softer lining of the hose in order that the hose section may be tightly clamped to said shank or stem. But no matter how tightly the clamping means may be applied it is practically impossible to embed the end of the shank or stem in the inner wall of the hose and the space left permits the material passing through the hose to enter between the hose wall and the shank or stem of the i coupling and in time load up with dirt, pebbles and/0r the like accompanying the material passing through the hose, with the result that the great pressure involved in moving such material through the hose tends to burst the same and destruction ofthe hose occurs at the joints directly adjacent the end of the Shanks or stems of the coupling memfabric, leather, or any material, or combination of materials, or compositlon of matter which, in its finished state, will be softer than the metal shank or stem over which it is aplied. p I have discovered that the employment of a soft shoe or lining interposed between the ends of the cou ling shanks or stems and the inner wall of t e hose sections prevents the entrance of the passing Huid or its constituents between said Shanks 0r stems and the hose lining and prevents damage to or rupture of the hose heretofore common at a point directly adjacent the hose coupling. In use it is necessary that the hose be bent or twisted and many of the bends occur directly at the couplings. By interposing the protective pad or cushion between the inner elastic lining of the hose and the stem or shank of the coupling and particularly at the end of the same, an increased amount of elastic material is provided which protects the elastic lining of the hose and prevents the shank or stem cutting through the some. Once such lining is cut, thematerial passing through the hose finds egress through such cut and ra id destruction Aof the hose ensues.

n Figure 1 of the drawings, 1 and 2A represent the complemental parts of a hose coupling, each of which is provided with a shank or stem 3, adapted to enter the lends of the hose sections indicated at 4. These)- liose sections may be of any usual construction, having a linin 4 of rubber or similar' elastic material. lamping'means are api plied externally of the hose sections and such clam ing means may be of the 'type lor sub-- stantially like that illustrated in the patent of J. F. W. Jost, N o. 953,422, dated March 29, 1910; comprising a air of substantially halfround sections 5, su stantially fitting the eX- ternal wall of the hose, and having lugs or lips 6, disposed in engagement with annular shoulders 7, carried by the shanks or stems 3. As ordinarily constructed and arranged, and as indicated in the drawings, the Shanks or stems 3 are simply inserted in the ends of the hose sections and the external clamping means applied; such clamping means being retained by suitable means such as the bolts 8 and nuts 9.v

In the form of coupling shown in Fig. 2 the shanks or stems are somewhat longer than those illustrated in Fig. 1; having integral extensions 3, and these extensions receive a protective sheath, cushion or pad in the form of a boot or shoe of rubber or other suitable material such as above-mentioned, such boot or shoe being indicated at 10, and shown as embedded in the elastic wall 4 of the hose sections. The ends of the` clamps 5 of the coupling members may extend beyond the ends 3a of the Shanks or stems 3 and the protective sheaths 10 covering the same and prevent the extreme bending of the hose. lVlien .in the boot or shoe, associated with' the inner wall of the hose that all danfger of the passing fluid or any of its any such bending occurs adjacent the couplin s, the protective pad or sheath covering sai extended ends 3 provides an additional cushion between the metal 'of the shanky and the inner elastic wall of the hose and prevents the shank or stem cutting into such elastic lining or wall. The extended ends 3 of the Shanks or stems 3 may be grooved or recessed at 11 to provide a corrugated surface, or otherwise shaped for the purpose of holding such boots or shoes in place or, if desired, such extended ends may be smooth inside and/or outside, as the case may be, all of which is within the scope of my invention.

In afpplying the protective means to the ends o the shanks or stems, I may coat the latter with some form of adhesive material, glue, rubber cement, a resinous or synthetic varnish, or any suitable body of a similar' nature designed to effect a tight connection with such shanks or stems, and when the latter are inserted in :the ends of the hose sections, the surface of such protective boot or shoe may be coated with similar material 1n order thath it may vadhere to and in some instances cohere with the elastic material forming the inner wall of such hose sections.

While the inner wall of the rotective boot or shoe may be worn away y the passing current of material, such wear will not extend vbeyond the ends of the Shanks or stems 3* and in practice the latter will be so embedded and the boot or shoe so suspen ed material entering the space between vthe inner wall of the hose and the Shanks or stems of the coupling members will bepreventtedj Practice has proven that the life of hose equipped with coupling members having thelrshanks or stems provided with the protective means forming the subject of my inventlon have been materially prolon ed. While. I refer to provide a double-wa led bootor s oe; a wall whose cross section is substantiall U-shape, as indicated in the drawings, may provide a sheath which is applied externally at the ends of the Shanks or stems'of the couplingv members and is provided with 'a flange overlying such ends, without departing from my invention.

While I have illustrated in the accompanying drawingsone form/of sheath or shoe for the endsvof the Shanks or stems of hose coupling members, I do not wish to be limited to the size, shape, or other feature of construction, or the character of the material employed, which may be changed to suit varying conditions niet in practice; the essential condition being that such sheath or shoe shall be softer than the ends of the Shanks or stems and of a nature' that will permit close association with and embedment in the elastic wall lining the hose sect-ions. This sheath or shoe makes a tight, close joint at the ends of the Shanks or stems between the same and the inner wall of the hose and cornpletely closes any gap or recess that may exist 5' between aid 'nner walland said Shanks o stems at t e ends of the latter.

I claim:

The combination of a hose section a couplngshank or stem inserted therein' said `10 shank or stem having its free end reduced internally and externally, and a doublewalled sheath of relatively soft material enclosing the reduced end of said shank or stem and having a portioli interposed between the 15 same and the lnner wall of the hose; the bore vof the inner portion of said' sheath havinnlgs the same diametery as the bore of the sha or stem. Y In witness whereof I have signed this specification. 2 i Aj. L. DoLD. 

